Interchangeable sound-amplifying means for talking or sound-reproducing machines.



No. 738,342. PATENTED SEPT. 8,1903.

A. s. MARI-EM. INTERCHANGEABLE SOUND,- AMPISIEYING MEANS FOR TALKING 0R SOUND. REPRODUGING MACHINES.

APPLICATION FILED APR. 7. 1902..

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UNITED STATES,

Patented September s, 1903.

ALBERT S. MARTEN, OF EAST ORANGE, NEW JERSEY.

INTERCHANGEABLE SOUND-AMPLIFYING MEANS FOR TALKING OR SOUND-REPRODUCING MACHINES.

SPECIFICATION forming part of Letters Patent No. 738,342, dated September 8, 1903.

Application filed April 7, 1902. Serial No. 101,648. (No model.)

To (0M who/1t it may concern.-

Be it known that I, ALBERT S. MARTEN, a citizen of the United States, residing at East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Interchangeable Sound Amplifying Means for Talking or Sound-Reproducing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawin gs, and to letters of reference marked thereon, which form a part OK this specification.

This invention relates to certain improvements in that class of sound-amplifying connections for phonospheres, phonographs, graphophones, gramophones, and similar sound recording and reproducing machines illustrated in the application filed in the United States Patent Olfiee January 24, 1902, Serial No. 91,032, the objects of the present improvements being to increase the convenience with which interchanges of the horn and talking-machines can be effected to facilitate construction and secure a more efficient operation of the parts and to obtain other advantages and results, some of which may be more fully and specifically referred to hereinafter in connection with the description of the working parts.

The invention consists in the improved interchangeable sound-amplifying means for talking or sound-reproducing machines and in the arrangements and combinations of parts of the same, all substantially as will be hereinafter set forth, and finally embraced in the clauses of the claim.

Referring to the accompanying drawings, in which like letters of reference indicate corresponding parts in each of the several figures, Figure l is an elevation showing a horn supported upon a stand, said horn being separably attached to the diaphragm boX or speaker of a sound-reproducing machine. Fig. 2 is a detail showing the small end of the horn, on which is a tubular metallic connection having a rubber or other elastic connection inserted therein. Fig. 3 is an end view of the same. Fig. 4: shows in detail an upper extension of the stand; and Figs. 5

and 6 are sectional views taken at lines a: and y, respectively. Fig. 7 is a detail view of a certain elastic washer.

In said drawings,a indicates the horn,which is of the construction described in niy said prior application, being provided at its small end with ascrew-thread and near its large end with a socket 1), adapted to receive the vertical center post of the stand d. Separably attached to the said small end of the horn is a short rigid metallic tube e, threaded in correspondence with the threads on the horn, and thus adapted to be screwed firmly and tightly to the horn, so that there will be no looseness at the joint conducive to vibration and an interference with proper sound reproductions. Said metallic tube e is also separable and independent from the diaphragmbox or speaker.

The stand dis preferably of the folding type, having legs d, braces d and the center-post dithelatterbeingintelescopicsections. The center-post is provided at the top with a socket d for a separable extensionf, the latter comprising piecesff ,hinged together, the hingepin being shown at in Figs. 1 and 4. At the top of the upper section f the same is threaded, as at f', and provided with clampplates 9 72, one to enter the socket and the other to clamp the parts in rigid immovable relation, the second being preferably a fingernut, threaded to properly engage the threads f At the lower end of the extension section or part f the same is provided with a stop bearingf to engage the lower section or part f and limit the pivotal movement of the upper member-f, so'that it will stop when'it arrives at a position of vertical alinement with the lower section f and the post (1 The said lower end of the section or part f is also provided at f with a socket to receive the projecting end of a latch bolt 2', arranged in a spring-chamber formed in the section or part f Below saidlatch-boltaspring j is arranged in said chamber to throw the latch-bolt into its locked position. The latch-bolt has a lat eral finger-piece t", by which it can be pressed down against the spring j to release the section or part f to permit the turning of the member or partf to a horizontal position and the horn to a vertical position, as hereinafter described. At the lower end of the part or section f the same is reduced in diameter to form a leg f to enter the socket 01 where it may be removably secured or allowed to rest free to be withdrawn at will.

By uncoupling the small end of the horn and pressing down upon the finger-piece t' the horn will assume a vertical position because of the arrangement of the socket described, the small end of the horn overbalancing the largeend and thelatterlyinguppermost. The vertical arrangement of the horn on the stand permits the born to be set aside in a corner, where it will not occupy much floor-space and without detaching said horn from its stand, the bell thus lying free from the floor away from danger of injury.

The construction described,taken in connection with separable coupling-tubes suited to the machine with which the horn is to be used, enables a rigid connection to be made with the machine and yet permits of a quick detachment without removing the born from the stand. The tubular connection preferred for the disk-machines and the phonosphere is angularly formed and pressed in half-sections from sheet metal,each section having a flange e extending around the angle from one end of the tube to the other, one of the flanges being wider than the other, and thus adapted to be doubled over the other to hold the sections together, as shown in Fig.5. At one end of each section of the tube 6 the metal is impressed with screw-threads which correspond, so that when the sections are joined the threads will be contin uous spirals suited to re ceive the threads oft-he horn. At the opposite end of the tube the sections are indented or impressed to form hollow outwardly-projecting bosses 6 The cavities formed on the inside of the bent tube are adapted to receive stay ribs or lugs .9, cast or formed on the periphery of an elastic washer r. Said washer fits closely within the end of the tube e and is held therein by the ribs or lugs s, which are adapted to spring into place in the cavities when the washer is forced into the tube. The elastic washer at one end is formed with an outward annular rib i on its periphery, which forms a shoulder against which the end of the metallic tube abuts. By this construction the tube Q can be fitted closely upon the tubular extension of the speaker or diaphragm-box without danger of looseness due to variations in diameter of said tubular extensions or the interference with proper sound reproductions because of such looseness.

To change the born from a phonograph to a phonosphere, for example, it becomes only necessary to withdraw the tubular extension suited to the phonograph from the speaker or diaphragm-box of said phonograph, unscrew the said tubular connection, the horn being held at the desired horizontal position to facilitate the work, then apply the angular and threaded connection 6 by screwing it upon the horn, and finally pushing the cushion-like or elastic washer thereof upon the speaker of the phonosphere, thus enabling the one born to serve with either of the various talkingmachines.

Having thus described the invention, what I claim as new is- 1. The combination with the horn and speaker or diaphragm-box, of a tubular metallic connection separable from the horn and having at its end distant from the horn an elastic washer having a detent holding said washer within said connection when withdrawing the same from the diaphragm-box, and adapted to engage the said diaphragmbox, substantially as set forth.

2. The combination with the horn having a threaded small end, of a tubular connection screwed at one end on said horn and thereby removably fixed against movement in the direction of the longitudinal axis of the said horn and at the opposite end having an elastic rubber washer fitted therein and adapted to receive the speaker or diaphragm-box, substantially as set forth.

3. The combination with the horn having a threaded small end, of a tubular connection screwed on said small end, and having at its end opposite that receiving the horn, an elastic washer, the connection being interiorlyiudented to form a hollow recess and the washer being provided with lugs to enter said hollow recess, substantially as set forth.

4. The combination with the horn, speaker, diaphragm-box and stand, of a rigid, angular, metallic tube, interposed between said horn and box and separable from both said horn and said box, said tube being in sections, flanged and joined together at their edges, substantially as set forth.

5. The combination with the horn, diaphragm-box and stand, of a coupling-tube adapted to be secured to the horn and provided with means to resist longitudinal movement, or movement both inward and outward in the direction of the longitudinal axis of the horn from the said horn, and having an india-rubber washer secured in the end thereof opposite that having said means for resisting said longitudinal movement and adapted to closely fit speakers or diaphragm-boxes of varying diameters, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 29th day of March, 1902.

ALBERT S. MARTEN. Witnesses:

CHARLES H. PELL, O. B. PITNEY. 

